red lightings vs blue or green

Best to shoot in raw, and underexpose by a full stop. I encounter this situation all the time, red is tough to meter for while blue and green tend to highlight (accentuate?) skin blemishes. I'm not shy about adjusting the "Camera Calibration" sliders in LR to accommodate such conditions.

This was at a stage lit only by high intensity green lights. Just green. Any other color was supplied by little lights on amps and pedals, or the TVs in the back of the room:

This is actually a fascinating subject, and really deserves its own forum for such discussions. Would you be so kind as to post a request for a "Concert Photography" forum under "Site Feedback"?